CAJ | 학술논문

针对双基地SAR距离徙动受发射和接收二维距离变化影响的问题,提出了一种提取平移不变模式双基地SAR频率变标因子的新方法.该方法将距离徙动随二维距离的变化转化为随一维距离量的变化,然后通过合理的线性近似得到了不受距离参数影响的变标因子;在此基础上,将线性频率变标算法推广到了双基地SAR领域;最后通过仿真验证了该算法的有效性.
침대쌍기지SAR거리사동수발사화접수이유거리변화영향적문제,제출료일충제취평이불변모식쌍기지SAR빈솔변표인자적신방법.해방법장거리사동수이유거리적변화전화위수일유거리량적변화,연후통과합리적선성근사득도료불수거리삼수영향적변표인자;재차기출상,장선성빈솔변표산법추엄도료쌍기지SAR영역;최후통과방진험증료해산법적유효성.
A new approach to the range-independence frequency scaling (FS) factor of translational invariant bistatic synthetic aperture radar (SAR) is presented to solve the problem that the range cell movement (RCM) of bistatic SAR is influenced by transmitter and receiver range histories. The change of the RCM with two dimensional ranges is translated into that with one dimensional range, so the independent FS factor is acquired with the linear approximation of range migration. And based on this new approach, the FS algorithm is extended into translational invariant bistatic SAR. Finally, the new approach is validated by point target simulations.